[Polymer 2.x][app-location] Query parameters for HTML suites disappear

[t2ym]

[Polymer 2.x][app-location] Query parameters for HTML suites disappear

Root Cause:

iron-location in app-location cannot handle query parameters properly with Polymer 2.x

Workaround:

• Use #hash tag instead of ?query_parameter to work around the issue.
• Use the patched @t2ym/web-component-tester (bower: t2ym/web-component-tester) with #hashtag support in html suites

Notes:

• Example test suites with the workaround: https://github.com/t2ym/live-localizer
• More descriptions on the issue: [hybrid][test][Polymer 2.0] app-location cannot properly handle query parameters live-localizer#58